Internal-comdustion engine



fllrmmng PIE] H. L. HOSTERMAN INTERNAL COMBUSTION ENGINE Flled March 1923 m I I Feb. 14, 1928.

Patented Feb. 14, 1928.

UNITED srA m PATENT or rice.- I i i i i j amine.

a lication filed time it; 1am emamib, sea-ma This invention relates to internal combustion engines and has for its obpottheprovisionof an improved overhead valve mecha- Ilism W ich,:whi1e capable general appli;

cation, is primarily designed 1' use on the driven vehicles, motor boats and the like. a i

The invention constitutes improvements im the invention set forth anddescribed inwmly pending application for United States Patent, Serial N umber 610,128, andi aimslto pm vide. certain improvements in the" structure therein shown, and; described.

Other objects and advantages of the in- 1 vention are to provide anxengine having anr oil chamber associated with the top thereof and adapted to contain a qnaaatity of oil having practicalwand eliici'ent overhead valve mechanism positioned in said chamber with the working parts thereof immersed in oil.

Another object of the inventionis a: providea new and; improved rocker arm audio provide new and improved means for: pesie tioning a push rod in operative position thereto sothat the same will be silent in operation and may be operated: in an oil reservoir with a minimum loss 301E501! Pen additional object is to providen new, and improved overhead valve mechanism whereby a longitudinal movementxofi a push rod will impart an opposite longitudinal movement of the valverod with aluminium loss of motion. a e

Other objects are accomplished anduadditional and numerous: other advantages gained by the novelconstruction, combinationand arran ement of parts hereinafter .de scribed and drawing, wherein I have shown a preferred.

form of the invention, it ibeing nnderstoodr thatfchanges andmodifications may he made and" that substitntions may heresorted to which come within the scope Ofthe claims 4 hereunto appended.

In thedrawings which torma part hereoii and in which similancharacters ofi refenence are used to indieatelike pants as the same appear in any of the several views and which with this invention.

rocker arm. a a

Figure-3 isatopwplanwiew airtime.-

illustrated in the accompanying;

to fonni thevoilvohamber oil throughthe bores inw-wlhichi the said rods are located.

(One-01f the particular-objects of this invention is to pnovide an engine homing? recipro= s. eatery rods: leading to the valve 1 chamber and oil reservoir and to prowlide new and im- Br adan means to oil 1 theratrom and in addition to said packing means, it is an aim of this invention to provide automaticallyoperahle means whereby ithleiair pressure in ztheealvei chamber will hereduceddnning the-operation oi the en- 1 gfifiI'Ollllfl said rods e invention aims to :provide an enclosed valve chamber adapted: to: hold oil and i havpnevent a loss of i gineiand to thorehy p'renentoil firom escap a a tube or other suitable communicating means leadin i-from the resemvoin to the intake-manifol wherehymthe suotion created by the -reciproeathry movement oftthe piston w-illlcause a vacuum or partialivacuum to be cheated in "the valve chamber which will effectually prevent any loss therefrom.

Wile the iniventionwhasbeen illnstnaaed as applied to engine head, it is to be understood that-the: same may he: applied to engines having 1 heads integral therewith and that the improved valve mechanism herein deseribed is adapted to the used on engines generall'y mnd may he used on devices of any: kindnin whioh a: similar valve movement Hroceediaigi now :to ali detailed description 015 'theinvention with neiterence to the particular adaptation thereof illustrated in the drawings, the mmnerallfiaisused to denote an theneoizantl extends rtherearonnd in spaced relatiim to .the and end ro f the head 5 V Theinumeml fiv denotes awpueh rod and the chanaeiiars aflt atipueh rod bore which extends vertically through the head 5 adiacent' one "nehead andithe numeral 6 a ver- V e tlCal -u ange which is arranged on thetop Figure 1 isa transversasectionala viewofi an engine head constructed: in aocomdnneex it a side thereof. The numeral 9 denotes a valve rod bore which extends from the chamber 7 to the exhaust chamber 10. The numeral 11 denotes a firing chamber and. the numeral 12 a port leading from the firing chamber to the exhaust chamber. numeral 13 denotes a valve rod bushing which is mounted in the bore 9 and projects upwardly into the chamber 7." The numeral 14 denotes a valve stem which is mounted in said bushing. The valve rod 14 is provided on the lower end thereof with a valve 15 which is arranged thereon to close the port 12. The valve rod is provided at the upper end thereof with a shoulder on which is secured by the nut 16, the valve saddle 17. The valve saddle 17 comprises a circular central portion l7 which is provided at the outer edge thereof with a downwardly turned, circumferentially extending flange 17 The saddle 17 is provided with a pair of arms 17 b which project downwardly from opposite sides thereof. Each arm 17 is provided at the lower end thereof with an out wardly projecting, horizontal portion 17 and each portion 17 is provided on each lateral side thereof with the flanges 17 which are arranged thereon to form aseat for the prongs on the rocker arm hereinafter described. j

The numeral 18 denotes a tube which is fitted on the upwardly projecting end of the bushing 13. The tube 18 is provided at the upper end thereof with an outwardly pro-' ecting flange 18 which is adapted to be positioned against the lower face of the central portion 17 and be retained in a position centrally thereof by the flanges 17 A coil spring 19 is mounted on the bushing 13 and the tube 18 and is compressed between the flange 18 and the bottom of the reservoir 7 so as to normally hold the valve 15 in a closed position and to hold the tube 18 against the central portion 17 The bore 8 is substantially larger in diameter adjacent the upper end thereof, the same being counterbored to receive the pack ing 20 and the spring 21, thus forming at the bottom of said enlarged portion an inclined annular shoulder 22. The enlarged portion of the bore is filled with suitable packing to a point in spaced relation to the bottom end thereof and a washer 23 is pressed down against the packing by the spring 21 forcing the same against the inclined shoulder 22 and thus fitting the packing 20 tightly around the rod 8.

The rocker arm 25 is provided with a semi-circular fork 26 having the fork mem bers 26 and 26 and, each of the fork members 26 and 26 are provided with a downwardly projectingend portion 26 which are adapted to seat on the horizontal portions 17 of the saddle 17, and be retained thereon by the flanges 17 c The rocker armis pro- The vided at the other end thereof with one prong 27 which is provided at the end stantially cylindrical lug 27 which is adapted tobe received in the upper end of the coil spring 21 and is adapted to contact with the upper end of the push rod 8. The arm '25 is further provided in the upper face thereof, at a point in the central portion thereof, with a semi-spherical socket 28 which is'adapted to receive the head 29 of the bolt 29; The bolt 29 is threaded in the vertical bore 30 in the bar 31 so as to be adjustable relative thereto and is provided on the upper end thereof with the locknut 32.

The bar 31 is suitably standing lug 33 which is I tegrally with the head 5, but may be posisecured on the uppreferably cast intioned thereon in any suitable manner to provide a support for the bar 31. The numeral 34 denotes a lid which is positioned on the "flange 6 and is suitably secured thereon so as 1 the seats 17 and on the top of the push rod,

to take up all play therebetween. chamber 7 is preferably filled with oil point indicated by the dotted line A it will be noted that all contact points in valve mechanism are below the oil level.

If desired, a small quantity of graphite 35 may be placed in the enlarged end of the bore 8 so as to cover the upper face of the washer 23 and prevent the actual contact of the oil in the reservoir with the packing 20.

' In addition to the features above described, the invention provides means whereby the suction caused by the reciprocatory movement of the engine piston may be'utilized to prevent a loss of oil during the operation of the engine. A gasket 43 or other suitable packing means is positioned between the lid 34 and the flange 6 and the lid 34 is bolted or otherwise secured on said flange 6 to provide a substantially air-tight joint therebetween. A bore 36 is formed in the flange 6 at a point adjacent the top thereof and above the level A of in said bore 36. The tube 37 extends downwardly with the other end thereof operatively mounted in the bore 38 in the intake manifold. The numeral 40 denotes a plate which is secured to the inner means of the screws 41 to cover the opening in the tube 37 and prevent the oil in the chamber 7 from splashing into the end of said tube. The plate 40 is provided witha centrally positioned inwardly directed, horizontal bulge which forms an opening 42 at each lateral side thereof, which openings are The to a and the the oil and a tube 37 is secured face of the flange 6 by ing upwardly through said head to said adapted to prevent the freepassage of air from the valve chamber 7 into the tube 37 28, but, it also exerts a pressure on the washer 23 and forces the packing downward- 1y against the inclined shoulder 22 so that the packing can be worn away to a considerable extent without affecting its efliciency.

While I have shown a cross sectional view of an engine head and have illustrated the invention as the same is applied to the intake port of such head, it is to be understood that the same is intended for like ap lication on exhaust valves and that it is to be ordinarily applied to multiple cylinder engines.

Having thus illustrated my invention and described the same in detail, what I claim as new and desire to secure by Letters Patent 1s 1. In an internal combustion engine, a head havinga chamber on the top thereof, said chamber ada ted to contain oil, valve mechanism locate with said chamber; a bore leadchamber, a rod mounted in said borewith the upper end thereof in operative contact with said valve mechanism; the upper portion of said bore being enlarged to provide a packing chamber around said rod; the lower wall of said packing chamber being-inclined at an acute angle to said rod; packing in said packing chamber and a coil spring mounted on said rod and extending into the upper end of said packing chamber, said spring arranged to force sald packing against the inclined lower wall of said chamber to maintain the same in a packed condition.

2. In an engine, ahead, 'a chamber on the top of said head,said chamber adapted to contain oil, bores extending. through said head to said chamber, valve operating rods mounted in said bores and projecting into said chamber, a rocker arm fulcrumed in said chamber and operatively connecting said rods, one of said bores being enlarged adj acent the upper end thereof to provide a packing chamber, the lower wall of said packing chamber being inclined at an acute angle to the rod positioned therein, packing in said packing chamber and a spring mounted on the upper end of said rock and compressed between said packing and said rocker arm,

3. In an internal combustion engine, an engine head; an oil reservoir on the top thereof, a rocker arm fulcrumed in said reservoir, a bore through said head, a push .rod mounted in said bore with the upper end thereof operatively contacting with said arm, said bore enlarged at the upper end thereof to provide a packing gland, packing in said gland, a spring mounted on said rod and compressed between said arm and said packing.

4. In combination, an engine head; an enclosed chamber associated with the to thereof; overhead valve mechanism in said chamber; said chamber adapted to contain oil at a level above the contacting parts of said mechanism, a push rod bore extendin through said headto said chamber, a pus rod mounted in said bore, the upper end of said bore enlarged to provide a packing gland, packing in said gland and resilient means to compress said packing.

5.,An engine head, a chamber associated with the top thereof, said chamber adapted to contain a quantity of oil, a push rod bore extending through said head to said chamber, a push rod mounted in said bore, said bore enlarged at and adjacent the upper endthereof to provide a packin said gland, a valve rod bore leading to said chamber, a valve rod bushing mounted in said bore, said bushing projecting upwardly into said chamber, a valve saddle on the top ofsaid valve rod, said saddle including a tube telescoping with said bushing; arms projecting downwardly from diametrically opposite sides of said saddle, a seat at the lower end of said arms, a spring adapted to normally hold said valve rod in an upward position, a support mounted in said chamber, a bolt threaded in said support from the underside thereof, said bolt having a semispherical head, a rocker arm having a socket adapted to receive said head, one end of said arm provided with a pair of diverging prongs adapted to seat on the lower ends of said first mentioned arms, a single prong on the other end thereof, said prong provided with a downwardly protruding lug arranged to contact with the upper end of said push rod, a coil spring mounted on said push rod with said lug received in the upper end thereof said spring arranged for compression between said packing and said single prong.

In testimony whereof I have hereunto set my hand.

HARRY L. HOSTERMAN.

gland, packing in l 

